Open AccessBidirectional solid current‐limiter forHVDC grids
Author(s) -
Li Jiantao,
Zheng Xiaoming,
Wang Gang,
Hong Chao,
Chen Yan
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8484
Subject(s) - fault current limiter , inductor , circuit breaker , fault (geology) , topology (electrical circuits) , transient (computer programming) , electrical engineering , limit (mathematics) , electric power system , computer science , engineering , power (physics) , electronic engineering , voltage , physics , mathematical analysis , mathematics , quantum mechanics , seismology , geology , operating system
High‐voltage direct current (HVDC) grids have been assumed as a promising technology for its advantages in accommodation and integration of large‐scale renewable energy. However, the fault current increases dramatically once the fault occurs in HVDC grids, which makes great difficulty in fault clearance. Therefore, it is necessary to take some measures to limit the fault current. A bidirectional solid current‐limiter (BSCL) topology is proposed. The BSCL can improve the performance of inductors to limit DC fault currents through the high‐frequency switching between two current‐limiting branches. Besides, the BSCL can be installed at both ends of a DC transmission line or between a converter and a DC bus. The feasibility of the proposed topology is demonstrated in power systems computer‐aided design/electro‐magnetic transient design and control. Simulation results indicate that the BSCL can effectively limit the rising speed and the amplitude of short‐circuit currents, decrease the maximum breaking currents of DC breakers and improve the breaking speed of DC breakers.